The iriver U100 features a 3.1-inch (320 x 480) touchscreen, up to 16GB internal storage, WiFi, microSDHC, FM tuner, and 720p video playback.
The iRiver N15 offers 12 hours of battery life, OGG support, and choice of 2GB or 4GB capacity.
The iRiver K1 Smart HD features a 3.5-inch touchscreen display and supports AVI, WMV, MP4, TP, MPG, and ASF video formats. The unit also features 8GB or 16GB capacities and 18 hours audio / 6 hours video playback.
Source: Engadget
The iRiver E200 features 4GB, 8GB, and 16GB capacities and microSD slot for expansion. It also features a 2.8-inch display and support for MP3, WMA, OGG, ASF and FLAC audio, together with MPEG-4, Xvid, WMV, RM and RMVB video file formats.
Source: SlashGear
The iRiver P35 supports MPEG4, Xvid and WMV in video and MP3, WAV, WMA, OGG, APE and FLAC in audio. It also features WiFi with full browser support on a 4.3-inches 480 x 272 resolution display.
Source: SlashGear